fix: convert HTML to Markdown in CommentInputField using turndown

[sumitdahal7]

What type of PR is this? (check multiple if applicable)

• 🍕 Feature
• 🐛 Bug Fix
• 📝 Documentation
• 🧑‍💻 Refactor
• ✅ Test
• 🤖 Build or CI

Describe this PR (brief summary)
This PR implements automatic conversion of HTML content to Markdown within the CommentInputField component using the turndown library.

Key improvements include:

• Automatic Conversion: Added a useEffect hook in CommentInputField that detects HTML tags in the comment state and converts them to Markdown.
• New Utility: Introduced markdownFromHtml in src/utils/htmlFromMarkdown.js which leveragesurndownService.
• Dependency Management: Added turndown (v7.2.4) to the frontend dependencies.